Q21. Plants serve as food resources for _________________
Q22. Animals and birds are the source of food for _____________
Q23. Agriculture is the main source of plant food for ______________
Q24. Which of the following produce energy in Sun?
Q25. The resources which cannot be exhausted by human consumption are called __________________
Q26. Solar radiation, wind power, water power and tidal power are __________________ and _________________ resources.
Q27. Identify the non-renewable resources from the following.
Q28. Which of the following human activity, may cause damage to the environment?
Q29. When harvesting of resources exceeds their reproduction or replenishment is called _____________________
Q30. Identify the environmental impacts of mining from the following.